Thank you for your reply Adam. However, I was rather referring to the Boots, Cloak, Talisman, and the Skull Ring in the Temple of Apshai. I am sorry I did not make myself clear. These items only have very vague explanations of them in the manual, if not any. I was playing the original TRS-80 version of Temple of Apshai, so it could definitely be different from the Trilogy Versions. As for the Magic Book, at least in the TRS-80 version, it raises Constitution. It makes sense because Wraith saps your constitution through chills. For some reason, in the TRS-80 version, Wraith are Wraiths in the manual, but it is "Wights" in-game.
By the way Adam, in the original TRS-80 version, "centipedes" can be encountered at Level 1, Room 54 and 55. They appear when you come adjacent to the treasure chest. Spiders can also be encountered at Level 1 Room 55. Maybe they have been deleted in the Trilogy, but these are their original locations. Spiders hit VERY HARD but their HP is low. I am guessing it's a D&D thing.
I was also wondering if anyone has made any good use of the ability to "speak" to monsters. On TRS-80, at Intelligence, Intuition, and Ego at 18, "speaking" always worked on the centipede, and sometimes worked on Antman and Giant Spiders,and that's it. It never worked on other monsters. I think it never works on the "strong" Antman, but on TRS-80, you cannot exactly tell the difference between the different types of Antman, other than guessing from the damage you receive. I did notice there were "ANTMAN" and "ANT MAN", but it seemed like this didn't have anything to do with the type of Antman.
Also regarding the Magic Sword (pardon me if this has already been mentioned). I am not sure if this applies to the Trilogy, but I am guessing it does to the original Atari and C64 versions. Magic Sword is not a weapon on its own, but it is an "enhancement" to the weapon that you already had. Thus, if you had Great Sword prior to obtaining the Magic Sword, you would still not be able to equip a shield. The enhancement level is randomly between +0~+2, and it rewrites any previous enchantment that you could have had. The message says the sword "glows" when the enchantment is either +1 or +2. If you pick up +0, then your weapon name goes back to the original weapon on the game-screen. I owe this knowledge to Ahab at Data Driven Gamer.
My experience points is now at 150,000. I have read articles and comments regarding the leveling system, and they say that the experience DOES influence combat (at least in the C64 BASIC version), but I wonder how much the actual influence is. It is really hard to tell if your character has gotten stronger through those experience points.